Gu-won inexplicably loses his power — and finds that Do-hee might be the key to regaining it. But his efforts to take back his abilities backfire.

After another attack, Do-hee asks Gu-won to be her guard — even after his admission as a demon. Do-hee finds the loss of someone close suspicious.

Do-hee proposes to Gu-won, but he refuses. She later recruits him to investigate Ju Cheon-suk's death, but he faces an unexpected power blockage.

After a dramatic rescue, Gu-won and Do-hee begin having complex feelings for each other. Do-hee later tries to find a man to marry — frustrating Gu-won.

After Gu-won saves Do-hee's life, she receives competing marriage proposals. She ends up choosing one, and finds an alarming face at her wedding.

Do-hee and Gu-won go through newlywed pains as they move in together. Ju Seok-hoon begins to suspect Gu-won's non-human identity.

After a sudden attack on Gu-won, Do-hee rushes to save his life — and as life around her becomes more dangerous, she makes a surprising career move.

As Do-hee and Gu-won's relationship finally blossoms, Gu-won begins to experience a strange change in his powers — all amidst a larger looming threat.

Upon discovering his fate, Gu-won tries to find another way to save himself. But just as he and Do-hee prepare their ritual, she becomes a target.